For the TNT instrumental magnitudes, the \(BV\) -band images are calibrated using the APASS catalog [1]} and the \(gri\) -band magnitudes are calibrated using the PanSTARRS catalog [2]}, [3]}, [4]}, [5]}. The local standard stars with photometric magnitudes from APASS and PanSTARRS are listed in Table REF . The unfiltered instrumental magnitudes from LOSS are calibrated to the standard Landolt \(R\) -band magnitudes based on the transformed local standards of SDSS [6]}, [7]}. The LOSS \(BVRI\)  instrumental magnitudes are calibrated to the Johnson system using a series of Landolt [8]} standard stars taken on a number of photometric nights.
